Mobil 1 (103535-6PK High Mileage 10W-30 Motor Oil, 1 Quart, (Pack of 6) Advanced full synthetic formula; helps prevent deposits and sludge build-up to enable long engine life Outperforms the conventional high mileage oils; extra anti-wear additive Helps protect critical engine parts in higher mileage engines; extra cleaning additive Helps reduce the sludge and deposits that conventional oils can leave behind; seal conditioner Helps prevent leaks